Permutation-lock



Modem i 2 Sheets-Sheet 2.

R. SOHUETZE. PERMUTATION LOCK. No. 288,871. Patented Nov. 20, 1883.

l l l I l I i I INVENTOR:

l lD MW I ATTORNEYS.

WITNESSES NITED STATES PATENT OFFICE.

ROBERT SCHUETZE, OF SAN ANTONIO, TEXAS.

PERMUTATION-LOCQK.

SPECIFICATION forming part of Letters 'Fatent No. 288,871, datedNovember 20, 1883.

Application filed June 23, 1883.

To :25 whom it may concern:

Be it known that I, Bonner Scnon'rzn, of

7 San Antonio, in the county of BeXa-r and State drawings, forming apart of this specification,

in which similar letters of reference indicate corresponding parts inallthe figures.

Figure 1, Sheet 1, is an elevation of the outer side of my improvement,the plate of the lockcasebeing removed. Fig. 2, Sheet 1, is asecshown insections.

release the bolt.

tional plan view of the same, taken through the line w r, Fig. 1. Fig.3, Sheet 2, is an elevation of the inner side of the lock, part of thecase-plate being broken away. Fig. 4, Sheet 2, is an elevation of thecombination scale-plates, the knob-spindle and fastening-screws beingFig. 5, Sheet 2, is an elevation of a part of the operating mechanism ofthe lock. Fig. 6, Sheet 2, is a side view of. one of the keys. Fig. 7 isan elevation of the bolt, showing a modification. I

The object of this invention is to provide combination-locks simple inconstruction, inexpensive in manufacture, strong, durable, not liable toget out of order, and reliable in use.

The invention consists in a combination-lock constructed with a slidingspring-pressed bolt,

a lifting plate and aspring-prcssed lever-catch engaging with the saidbolt, three eight-toothed wheels having unequal teeth and engaging witheach other and the bolt, plate, and catch, and a knob and knobspindlcconnected with one of thetoothed wheels,whereby the said plate and catchcan be operated to release the bolt, and the said bolt can be drawn backby operating the said knob. Tothe knob is adjustably at tached ascale.-plate,which is surrounded by a stationary annular scale-plateattached to the door, whereby it can be known when the toothed wheelscome into the right position to The key-hole escutcheon is made withcross-head ends and a longitudinal slot widened at its center, and iskept in place bytwo plates having their edges rabloeted to receive thesaid escutoheon and allow the escutcheon to be adjusted to hold the keyfrom turning, as will be hereinafter fully described.

(Modem A represents the case of the lock, which may be so formed as toadapt the lock for use as a rim-lock, as shown in Figs. 1 and 3, or as amortise-lock, as shown in Fig. 2 and in dotted lines in Fig. 3, as maybe desired.

B is the bolt, which is made with an oiiset, as shown in Fig. l. Thebolt B is thrownand held forward by a spiral spring, 0, placed in aslot, D, in the lower part of its offset, and the forward end of whichpresses against the said bolt at the forward end of the slot D. The rearend of the spring 0 rests against a stud, E, attached to a plate of thelock-case A, and which projects into the slot D, and serves as a guideto the bolt B in its forward and rearward movements. In the upper partof the offset of the bolt B is formed a slot, F, into which projects astud, G, attached to a plate of the lock-case A, and serving as a guideto the said bolt in its forward and rearward movements, and as a pivotto the said bolt in its oscillating movements. The bolt B is held from arearward movement when its rear end is lowered by a stud, H, attached toa plate of the lock-case A, and which enters a recess, I, in the loweredge of the rear end of the said bolt. The stud H also serves as a stopto limit the downward movement of the said rear end of the bolt B. Theupward movement of the bolt B is limited by a stud, J, attached to aplate of the lock-case A, and which also serves as a guide to the boltin its forward and rearward movements. In the rear end of the bolt B areformed one or more teeth, K, with which engages a lever-catch,hereinafter described, to hold the said rear end of the bolt B frombeing raised. In the lower edge of the offset of the bolt B is formed atooth, L, with which engages a. toothed wheel, hereinafter described, todraw the said bolt back, and thus unlock the door.

'M is a liftingl'plate, which is arranged with its upper end beneath theedge of the rear part of the bolt B, and has a rearwardly-pro jectingarm upon its lower end to receive the pivot'N, attached to aplate of thecase A, and upon which the said plate M works. In the forward edge ofthe lifting plate M is formed a recess or slot, 0, to receive the stud1?, attached to a plate of the case A, to limit the upward and downwardmovement of the said plate. The lower part of the rear edge of thelifting plate M is concaved upon the arc of a circle having its centerin the axis of the key 6, and upon the upper part of the said rear edgeis formed a shoulder or tooth, M, for the bit of the key to strikeagainst and raise the said plate.

Q is a lever-catch, which is pivoted at its lower end to the lower rearpart of a plate of the case A, and is held forward by a spring, R, whichrests against the rear edge of the said catch Q, and is attached to theplate of the case A or to the. catch Q. In the latter case the free endof the spring rests against a stud attached to the side plate of thelock-ease. The upper end of the catch Q projects forward and has atooth, S, formed upon it, to engage I the offset of the bolt B, and hasseven short teeth, which are made of such a length as to pass thebolt-tooth L when the forward part of the said bolt is lowered, and onelong tooth of such a length as to pass the bolt-tooth L only when theforward end of the bolt B is raised. The wheel U is made with one longtooth, with its second, fourth, fifth, seventh, and eighth teeth ofmedium length, to correspond with the short teeth of the wheel T, andwith its third and sixth teeth short. The wheel U is so placed that itslong tooth will engage with the forward part of the lower end of thelifting plate M and raise it. To raise the rear end of the bolt B itslong and medium teeth will engage with the long and short teeth of thewheel T, and its short teeth will only engage with the long tooth of thesaid wheel T. The wheel Vis made with one long tooth, with its second,fourth, sixth, seventh, and eighth teeth-of medium length, and with itsthird and fifth teeth short. The wheel V is so placed that its longtooth will engage with a rounded downward projection formed 011 thelower edge of the middle part of the levercatch Q, its long and mediumteeth will engage with the long and medium teeth of the wheel U, and itsshort teeth will only engage with the long tooth of the said wheel U.The wheel T is made with a hub of sufficient length to enter and work inround holes in the side plates of the case A, and thus serve as a pivotto the said wheel. The bore of the hub of the wheel T is made square toreceive and fit upon the spindle W, one or both ends of which projectand have knobs X secured to them by screws Y, several holes being formedin the said spindle to allow the lock to be fitted to doors of differentthicknesses.

Z is a plate through which the knob-spindle W passes, and which issecured to the base of the knob-shank by two screws, a. The screws apass through curved slots 1) in the plate Z, as shown in Fig. 4, so thatby loosening the screws to the plate Z can be adjusted to change thecombination. The edge of the plate Z is beveled upon the outer side tofit into the inner edge of the annular plate, 0, which iscorrespondingly beveled upon the inner side, and which is designed to besecured to the door by two or more screws, d, as shown in Fig. 4.. Uponthe adjacent edges of the plates Z c are formed scales of eighty (moreor less) equidistant division-marks, which are numbered by tens, or inany other convenient manner.

With this construction, when the lock is to be unlocked from the outerside of. the door, the knob X is turned to the left untilby theengagement of the wheels T U W the wheel V has been revolved to bringthe long tooth of the said wheel upward and cause it to raise the levercatch Q. The knob X is then turned to the right until the engagement ofthe wheels T U has revolved the wheel U to bring the long tooth of thesaid wheel upward and cause it to raise the lifting plate M and raisethe rear of the bolt B. The knobX is then turned to the left until thelong tooth of the wheel T engages with the tooth L and draws back thebolt B. Care must be taken each time not to turn the knob X too far, orthe long tooth will be carried past the vertical position and the wholeoperation will have to be repeated. As the knob X must always be inexactly the same positions, when the long tooth is in the positions todo work, by noticing the numbers upon the scale of the plate 0 whichsome particular number of the scale upon the plate Z is opposite, whenthe said long teeth come into position, which numbers form thecombination, and by carefully observing these numbers when unlocking thelock, the operation can be readily performed. The combination can bechanged at any time by detaching the knob X, loosening the screws a, andmoving the plateZ forward or backward a certain number of marks.

To open the lock from the inside, insert the two-bit key 6 in the rearkeyhole, f, and turn the said key to the right through a quarter of arevolution and secure it in position by slidin g the escutcheon gdownward. Then insert the single-bit key It inthe forward key-hole, '13,and turn the said key to the left, which draws back the bolt Bandunlocks the door. When there is a knob at each side of the door, thesinglebit key is not required, and the bolt is drawn back by turning theinner knob.

In locks where it is preferred to have the bolt B remain in place whendrawn back, in* stead of shooting forward when the knob is turned to theleft after drawing the bolt, the stud G is placed a little fartherforward in the slot F of the bolt 13 than the position shown in Fig. 1,so as to prevent the said bolt from sides of the said eseutcheon g byscrews k. The

under sides of the inner edges of the plates j are rabbeted to receivethe side edges of the escntcheon g, and thus keep the said eseutcheon inplace, while allowing it to move up and down freely, the cross-head endskeeping it from sliding out of place. The escutcheon g is slottedlongitudinally to receive the key e, and the iniddle part of the saidescutcheon is enlarged to allow the stem of the said key to turn. Thestem of the key is made square, so that the said key can. be held fromturning by sliding the escutcheon downward to bring the narrow part ofits slot upon the square stem of the key e. I

When the lock is to be used as a chest-lock, the forward end of the boltB is out off, and L- shaped slots Z are formed in the upper edge of thebolt B, to form catches m to enter keepers n, attached to the lid of thechest.

When the lock is to be used as a drawerlock, the forward part of thebolt B is cut away, and upon the upper edge of the said bolt is formed alug, to which is pivoted a small bolt, which passes out in an inclineddirection through a guide-slot in the upper edge of the lock-case, andhas its upper end beveled, so that a forward movement of the bolt B willcause the said pivoted bolt to approach a vertical position, and thus beprojected to lock the drawer.

If desired, the spiral spring G can be re placed by a straight or othershaped spring attached to the lock-case and resting against the rearshoulder of the offset of the bolt B.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent 1. A. combination lock constructedsubstantially as herein shown and described, and consisting of thesliding spring-pressed bolt B, having the tooth L and recess I, the stopH, the lifting plate M, the spring-pressed lever-c'atch Q, the threeeight-toothed wheels T U V, and the knob X and knobspindle W, as setforth.

2. In a combination-lock, the combination, with the spring-pressed boltB, having recess I and teeth K on its rear end, of the stop H, thelifting plate M, having a curved rearwardly-projeeting arm, and a notch,O, which receives stud P, and the spring lever-catch Q, having a tooth,S, and incline Q, said plate and catch being adapted to be operated bythe bit of a key, substantially as herein shown and described, wherebythe said plate and catch must be operated before the bolt can be drawnback, as set forth.

ROBERT SCHUETZE.

Witnesses:

FRED BADER, M. VVEYEL, Jr.

